Underhung TC Nomz

Been after one of these for years, finally got a pair.

Originally Posted by audioholic

Saying "clipping doesn't kill speakers" is a half-truth at best. Technically no, clipping itself does not hurt the speaker. But in clipping your amp, you can easily create a situation that WILL kill the speaker. Was the squared waveform the DIRECT cause of the failure? No. In the end, the answer is, always has been, and can only be... heat kills speakers. BUT, clipping increases heat generation, sometimes by a drastic amount. So to start a thread simply to state that clipping does not hurt speakers is, again, a half-truth at best.

Re: Underhung TC Nomz

Gimme!

What's the model/name of those motors?

Originally Posted by ducatipaso

15inch subs can't play fast beats, they take more power and that taxes the vehicles electrical system. You will wake up and "hear" then see the light at the end of the tunnel and it will be 3 10's pounding so hard you wont even open your trunk or turn your system on because you 15's will sound sloppy & weak.

Originally Posted by benbenondatrack

stfu lesbo.why are you worried about me so much? you must want to date me ya little cookie monster but i dont even like sweets. your just a cup full of ice, dirt dead nasty azz ice...without the water.

Re: Underhung TC Nomz

Originally Posted by gckless

Gimme!

What's the model/name of those motors?

It's basicaly a beefed up MASS able to drive the shit out of a port (MASS drivers were designed for sealed applications). A nice 10 layer flatwind with a Kapton former, nice and light to stay snappy tight.

Originally Posted by audioholic

Saying "clipping doesn't kill speakers" is a half-truth at best. Technically no, clipping itself does not hurt the speaker. But in clipping your amp, you can easily create a situation that WILL kill the speaker. Was the squared waveform the DIRECT cause of the failure? No. In the end, the answer is, always has been, and can only be... heat kills speakers. BUT, clipping increases heat generation, sometimes by a drastic amount. So to start a thread simply to state that clipping does not hurt speakers is, again, a half-truth at best.

Re: Underhung TC Nomz

Originally Posted by ciaonzo

It's basicaly a beefed up MASS able to drive the shit out of a port (MASS drivers were designed for sealed applications). A nice 10 layer flatwind with a Kapton former, nice and light to stay snappy tight.

Ahh ok. What are the advantages/disadvantages of a coil that short?

Originally Posted by ducatipaso

15inch subs can't play fast beats, they take more power and that taxes the vehicles electrical system. You will wake up and "hear" then see the light at the end of the tunnel and it will be 3 10's pounding so hard you wont even open your trunk or turn your system on because you 15's will sound sloppy & weak.

Originally Posted by benbenondatrack

stfu lesbo.why are you worried about me so much? you must want to date me ya little cookie monster but i dont even like sweets. your just a cup full of ice, dirt dead nasty azz ice...without the water.

Re: Underhung TC Nomz

Originally Posted by gckless

Ahh ok. What are the advantages/disadvantages of a coil that short?

I was just going to ask that. It is very unusual.

I would guess that with triple stacked magnets and high Xmech, the coil needs not be so long. It's probably the same amount of wire found in the usual 4 layer 2.5" DVC subs, but compressed........with 10 layers.

Re: Underhung TC Nomz

Originally Posted by gckless

Ahh ok. What are the advantages/disadvantages of a coil that short?

Underhung is usually intended for very low distortion applications. Obviously, there's much less moving mass and inductance so very good for wide bandwidth use. BL is more linear than overhung so THD stays very low, but it's like a brick wall when it's done.

Originally Posted by audioholic

Saying "clipping doesn't kill speakers" is a half-truth at best. Technically no, clipping itself does not hurt the speaker. But in clipping your amp, you can easily create a situation that WILL kill the speaker. Was the squared waveform the DIRECT cause of the failure? No. In the end, the answer is, always has been, and can only be... heat kills speakers. BUT, clipping increases heat generation, sometimes by a drastic amount. So to start a thread simply to state that clipping does not hurt speakers is, again, a half-truth at best.

Re: Underhung TC Nomz

Originally Posted by ciaonzo

Underhung is usually intended for very low distortion applications. Obviously, there's much less moving mass and inductance so very good for wide bandwidth use. BL is more linear than overhung so THD stays very low, but it's like a brick wall when it's done.

Ok. I understood the reason behind underhung, guess I just never seen a flux diagram with an underhung motor. So, with the shorter coil, the entire coil should stay within the main motor force area (don't know what that's called ) throughout the full stroke? As opposed to a longer coil that would have part of the coil inside, part of the coil outside on each side of it's stroke. What are the differences there?

Originally Posted by ducatipaso

15inch subs can't play fast beats, they take more power and that taxes the vehicles electrical system. You will wake up and "hear" then see the light at the end of the tunnel and it will be 3 10's pounding so hard you wont even open your trunk or turn your system on because you 15's will sound sloppy & weak.

Originally Posted by benbenondatrack

stfu lesbo.why are you worried about me so much? you must want to date me ya little cookie monster but i dont even like sweets. your just a cup full of ice, dirt dead nasty azz ice...without the water.

Re: Underhung TC Nomz

Originally Posted by gckless

Ok. I understood the reason behind underhung, guess I just never seen a flux diagram with an underhung motor. So, with the shorter coil, the entire coil should stay within the main motor force area (don't know what that's called ) throughout the full stroke? As opposed to a longer coil that would have part of the coil inside, part of the coil outside on each side of it's stroke. What are the differences there?

In underhung the coil stays within the gap through the whole stroke. Original RE XXX was underhung and AFAIK MT was as well. More often used in midrange. You save mass for sure and get a very even BL curve until the coil leaves the gap. As OP stated, they're great until you get into big excursions. Big downside from manufacturing standpoint is you need a big arse top plate.